I'm trying to migrate towards SRTP on our handsets. However, some of my softclients (Bria for the iPhone and Windows/Mac OS X) only support "all-or-nothing" SRTP. Meaning, the caller must support SRTP or must not support it. I know Bria on the iPhone supports an "if supported" mode, however, Counterpath's Bria for the iPhone implementation of this generates errors on outbound calls to FreeSWITCH.